| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansion method of a PC tank which stores clean water or the like, unnecessitates a wide site to cover capacity shortage, and can maintain with ease an existing tank and a new tank. SOLUTION: A new bottom slab expanded to a specified size is constructed at the outer periphery of the bottom slab of the existing PC tank and a cylindrical new inner wall widened separately with a specified distance from the side wall of the existing PC tank is constructed, and further, a cylindrical new external wall is widened with a specified distance from the newly installed internal wall and constructed. COPYRIGHT: (C)2005,JPO&NCIPI
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